I'm putting together a little overview/"cheatsheet" file of the theme capabilities in ST3.WIP but still practical to have while making a theme even at it's current state so here is a link.Link to Gist

Will eventually map it all out and continue to test for unknown class, property and attribute combinations and so on.If you know of any combinations not in the default theme I'll be happy to test to confirm and add it to the overview.(And any other tips/tricks for that matter)

I am monitoring that progress but I figured that I will stay one build behind in case of small changes. Less chance of "doesn't work" issues that way. But will probably add a latest additions section for that when I properly sort it.